I just from exam. I don't know, about the results, but those questions suck. Today I tried it second time. What can I say, there are a lot of questions of air conditioning systems, ducts, chimneys installations, flashings and also math tasks with formulas. Actually, it looks that they give less time for answers, than those questions require. You can't think a lot, just like robot to go throw it quickly. It's stupid. Too many questions.

3.What is used to prepare a joint on cold rolled iron for brazing?
A.Acid.
B.Degreaser.
C.Grinding disk.
D.Wire brush.

4.How should a 15-m wire rope be stored?
A.Coiled dry and hung on a hook in a dry area.
B.Wound dry on a reel and stored in a dry area.
C.Lubricated, coiled, and hung on a hook.
D.Lubricated and wound on a reel.

5.What is the minimum requirement to layout a pattern for a square-to-round on centre?
A.3/4 of the plan view.
B.1/4 of the plan view.
C.1/2 of the plan view.
D.Full plan view.

6.What is the net blank cut size for a 90° 14-in. diameter seven-piece elbow, used in a material handling system?

7.If 24 gauge metal is 0.686 mm (0.027 in.) thick, approximately how much must be taken from the circumference of a round pipe to make a small end?
A.3/32 in.
B.1/8 in.
C.3/16 in.
D.7/32 in.

8.A top takeoff used in a residential heating system has an equivalent length of 40 ft. with a design static pressure loss of 0.08 in./wg. What is the resulting friction loss?
A.0.032 in./wg
B.0.32 in./wg
C.3.2 in./wg
D.32 in./wg

9.Which combination of materials will corrode the quickest due to electrolysis (or galvanic reaction)?
A.Aluminium and copper.
B.Steel and copper.
C.Nickel and copper.
D.Lead and copper.

13.What is the unit cooling capacity of a 3 100 cfm roof top unit with an economizer and an enthalpy difference of 6.5 Btu/lb. between the mixture air and the supply air?
A.1.80 tons
B.2.50 tons
C.6.75 tons
D.7.50 tons